To control quality of swimming pool water, a filtering system is usually not adequate. To control or prevent growth of organisms in swimming pool water non-professional users may treat private pools. For disinfection, appropriate balanced water chemistry is required to maintain an adequate active chlorine level. The active chlorine (free chlorine) disinfectant is used to sanitize, i.e. to kill disease-causing organisms, and to oxidize, i.e. to destroy ammonia, nitrogen-containing contaminants...
